Why is Twitter so popular now?

I’ve been Twittering and I must admit. It’s addicting due to its real-time updates. That’s what mainly draws people to Twitter where they share their brief thoughts quickly and to share links too. Another thing I’ve been thinking why it’s so popular is that it fills the void of a profile page for personal websites or blogs. Many Twitters have their own personal website. Twitter is the one that is frequently updated, so users explore around, reading different tweets and if they happen to find that “profile page” interesting, they may click on the personal website address at the top right to learn more about that person and what s/he may have blogged.